Road - Taxi & Bus, Tokyo
I took a taxi from downtown to my hotel. Once again I didn't pay for it and it is very convenient when you are in the street at night and the subway is closed.
Bus to and from Tokyo to Narita is getting popular now, it takes about 1 hour ride but sometimes it depands on the traffic, you may simply catch in the traffic Gem if there is a road accident.
Till the Joban Shinsen (The New Joban Line) gets ready,
no better choice togo to Tsukuba than the JR Highway Bus: A 60 minutes ride for 1250 yen.